Democrats relying on big donors to win

Among the groups reporting the biggest political ad spending, the 15 top Democrat-aligned committees have outraised the 15 top Republican ones $453 million to $289 million in the 2014 cycle, according to a POLITICO analysis of the most recent Federal Election Commission reports, including those filed over the weekend — which cover through the end of last month.

Left-leaning billionaires continue to top the list of the biggest super PAC donors, with an ever-increasing chunk of the cash coming from just one man, reports to the Federal Election Commission filed in August show.